ALC658-LF datasheet(31/51 Pages) REALTEK

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ALC658

Datasheet

Six-Channel AC’97 2.3 Audio Codec

Rev. 1.3

6.3.3.

MX66 Sense Function Select

Default: 0000h

Table 42. MX66 Sense Function Select

Bit

Type

Function

15:5

Reserved

4:1

R/W

Function Code bits, FC[3:0]

These bits specify the type of audio function described in page ID 01h MX66, MX68, and MX6A.

0h: FRONT-OUT (pin-35/36)

1h: SURR-OUT (pin-39/41)

2h: CEN/LFE-Out (pin-43/44).

5h: MIC1 In (pin-21)

6h: MIC2 In (pin-22)

7h: LINE In (pin-23/24)

Others: Reserved

R/W

Tip or Ring Selection, T/R

This bit sets which jack conductor the sense value is measured from. It is combined with FC[3:0].

0: Tip (Left channel)

1: Ring (Right channel)

6.3.4.

MX68 Sense Function Information

Default: 02F1h

Table 43. MX68 Sense Function Information

Bit

Type

Function

15:5

Reserved

R/W

Information Valid bit, IV

0: After a sense cycle is completed indicates that no information is provided on the sensing method

1: After a sense cycle is completed indicates that information is provided on the sensing method

Clear this bit by writing “1”, writing ‘0’ to this bit has no effect.

3:1

Reserved

Function Information Present, FIP

When this bit is set to ‘0’, indicates that the G[4:0], INV, DL[4:0] and ST[2:0] bits are not supported.

6.3.5.

MX6A Sense Detail

Default: 0000h

Table 44. MX6A Sense Detail

Bit

Type

Function

15:13

Reserved

12:8

Sense bits, S[4:0] (Default value depends on sensed result after Cold Reset)

For output devices: (FC[3:0]= 0h, 1h, or 2h)

02h: Not specified or unknown 05h: Powered speaker

06h: Earphone or passive speaker

Other: Not supported

For input devices: (FC[3:0]= 5h, 6h, or 7h)

12h: Not specified or unknown

13h: Mono Microphone 15h: Stereo Line-In

Other: Not supported

This field reports the type of output/input peripheral plugged into the jack after sensing.

7:0

Always read as 0.

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